Finding the Third Proportional to 386,437.50 and 839,412

Step by Step Solution

1. Step 1: Write the proportion equation
   386,437.50 : 839,412 = 839,412 : x
2. Step 2: Convert to fraction form
   386,437.50/839,412 = 839,412/x
3. Step 3: Cross multiply
   386,437.50x = 839,412 × 839,412
4. Step 4: Simplify right side
   386,437.50x = 704,612,505,744
5. Step 5: Solve for x
   x = 704,612,505,744/386,437.50
6. Step 6: Final answer
   x = 1,823,354.37